Demountable rim



Jams, 1929. 1,698,022

A. D. MACGILLIVRAY DEMOUNTABLE RIM Filed Feb. 25, 1927 2 Sheets-Sheet 1 v /7 l i Q Q /8 i C (0 r /6 i5 f0 4 \2/ v INVENTOR ATTORNEYS Jan. 8; 1929. A. D. MACGILLIVRAY DEMOUNTABLE RIM I I Filed Feb. 25, 1927 2 Sheets-Sheet. 2

Patented Jan. 8, 1929.

' arrarats ALISTEE DUNCAN MACGILLIVRAY, OF SAN EEDRO DE MIACDBIS, DQIMIN ICAH REPUBLIC.

DEMOUNTABLE RIM.

Application filed. February 25, 1927. Serial No. 170,800.

My invention relates to anew and improved form of tire retaining rim for wheels of automobiles or the like.

' ()ne of the objects of my invention is to provide a tire retaining rim which will be of simple and sturdy construction and which will enable a. tire to be readily a plied to and removed from the wheel of an auton'iobile.

Another object of my invention is to proretaining membcrof discontinuous circular contour.

Another object of m: invention is to provide a tire retaining rim structure which shall be independent of the expansion or wedge means heretofore used in connection with demountable rims of the well known type.

Another object of my invention is'to provide a rim construction of great rigidity and firmness, and which will enable the tire to be removed or applied with very little or no injury thereto.

Other objects of my invention will be set forth in the following description and drawings which illustrate a preferred embodiment thereof, it being understood that the above general statement of the objects of my invention is intended merely to generally ex.-

30 plain the same and not to limitit in any manner. Fig. 1 is a front elevation showing the improved device. Fig. 2 is a top view of the device shown in Fig. 1. 1

Fig. 3 is a front elevation of the detachable rim member.

Fig. 4: is a section on the line e% of Fig. 2. Fig. 5 is a section on the line 55 of Fig. 1.

Demountable rim constructions of the ordinary type have heretofore included circular rims having a continuous contour or periphery which were held, in position by means of laterally movable wedge like members which served to expand the demountable "rim and to hold it in position on the felly of the wheel. In pplying a tire to such a rim, or in removing the tire from the rim, it was necessary to stretch and twist the tire, so that the tire suffered considerable injury every time it was applied or removed, especially if the workmen were careless.

According to my invention, the tire can be assembled with the rim structure or be removed therefrom with little or no injury, even by a careless workman.

vide a rim structure embodying a detachable My invention is preferably employed in connection with a detachable wheel of any wellknown type, such as a disk wheel or a wire wheel. Trlowever, my invention is not restricted to the use thereof in connection with a detachable wheel and in the drawings .1 have shown it in association with an ordinarywooden wheel W. This wheel is provided with a felly 13 of any suitable type. In the embodiment herein illustrated, the felly "18 has a'recesscd or U-shaped contour so that it is provided with two vertical side walls. However, the felly 18 may be solid, so that itis provided with a smooth outer surface.

A main rim member 18 is suitably connected to the folly of the wheel. This main rim member 18 can be permanently-connected to the wheelby welding or the like. lLikewise, it may be connected to the folly of the wheel by fastening members of any suitable type which are'ind ependent of the fastening members which connect the detachable rim member to the wheel, so that the detachable rim member canbe removed from the wheel while the main rim member 18 remains con nected to the wheel.

The main rim member 18 has a continuous rear vertical flange 10 and it is provided for substantially five-sixths of the periphery thereof with afrontedge 16. s This front edge ltiextends to a laterally projecting portion which terminates in a short vertical flange 12 having vertical edges. As shown in Fig. 1, the front flange 12 of the main rim member occupies about one-sixth of the circumference of the felly.

. As shown in Fig. 2, the lateral projection ofthe main rim member18'may have flaring edges cooperating'with the edges 12 of the member 17 so as to prevent any lateralmovement of the detachable rim member 17, when the parts are assembled asshown in Fig. 2, but my invention is not limited to thislconstruction. H

The main rim member 18 is provided with an opening 21 for the valve of the pneumatic tire whichisto be held upon the. wheel.

As shown in Fig. 3, the detachable rim member 17 has a discontinuous circular contour or periphery and it terminates in lateral edges 12 which have the same contour as the lateral edges of the projection of the main rim member 18. The front detachable rim member 17 is also provided with vertical fastening lugs 15 having bolt openings 16 The rear edge of the detachable rim member 17 is free from a flange, and the said detachable rim member 17 is provided at the front thereof .with a front flange 11 which is complemental to the front vertical flange 12 of the lateral projection of themain rim member 18.

i. As shown in Fig. 5, the felly 13 may have ac'oncave or recessed contour and it is provided at the rear edge thereof with a shoul der 14 upon which the main rim member 18 is adapted-to rest. The main rim member 18 may be'welded to the shoulder 1 1 or be connected thereto by any suitable fastening means. Likewise, the main rim member 18 may rest detachably upon the shoulder 14.

The front member 17 is held in position by meansof bolts having nuts 20. As shown in Fig. 5, the detachable rim member 17 interlocks-with the felly 13. Even if the main rim member 18 is detachable from the folly 13, it

is held in position by the bolts 16, in the construction shown in Fig. 5.

After a pneumatic tire has been mounted and used for the customary period of time, there is'considerable adhesion between the beads of the tire and'the adjacent surfaces of the rim. I

However, according'to my invention, if it is necessary to replace a tire upon a wheel, the

wheelcan be detached (if it is of-the detachable type) and the nuts 20 can then-be readily removed. Since the-main rin'rmember 18 is relatively very narrow (save for the pro jection thereof terminating in'the flange 12) it is very simple to'tilt-the detachable member 17 together with the tire'upon the felly of the wheel so as to forwardly tilt that part of the member 17 which is opposite to the flange 12, until this part of this rim member 17 substantially clears the felly of the wheel so that the valve of the tire is released from the 0 pening21. Since, as shown in Fig.5 for-example, the front or detachable rim member hasa Width which is almost equal to the entire width ofthe device, both beads of the tire rest tion is further facilitated by the fact that the detachable rim member 17 has a discontinuous periphery.

After the tire has been repaired, it can be very easily placed upon the detach-able rim member-17, and the assembled tire and rim member 17 can then be mounted upon the felly of the wheel by reversing the operations above mentioned.

In order to permit the detachable rim mem ber 17 to be removed from the wheel by the tilting and lifting movement above menshould not be too long and hence I prefer that it should not extend around more than about- (30 of the circumference of the wheel.

I have shown a preferred embodiment of my invention, but it is clear that numerous changes and omissions could be. made with out departing from its spirit.

I prefer to have the front discontinuous because this form enables the tire and the associated rim member to be rea moved most easily by a tilting and lifting movement, and also facilitates the separation of the rim member from the tire.

I claim A tire retaining device comprlsmgl a first member having an outer circumferential edge provided with-asubstantially continuous flange, said first member also having an inner circumferential edge having a-.discontinuous and laterally projecting portion having a flange, and a second member complemental to said first member, said complemental member having an inner circumferential edge adjacent the inner circumferential edge of said first member, the lateral edges of said complemental memberbeing adjacent the edges of said laterally projecting portion,

tionecl, it is important that the front flange 12 rim member 17 j l said complemental member havinga flange at the outer circumferential member thereof which is complemental to the fiangeof said laterally projecting portion, said complemental member being sufficiently wide to have both beads of the tire rest thereon, said pro jecting portion being suiiiciently short to permit the complemental member and atire mounted thereon to be separated from the first member by a tilting and lifting movement, said first member and said complemental memberbeing free from-any connections adapted to prevent said tilting and lifting movement. V s

' In testimony whereof I'afiixmy signature.

' ALISTER DUNCANIMACGILLWRAY; 

